Process of guide-marking etchable surfaces.



C. W. SAALBURG. PROCESS OF GUIDE MARKING ETCHAB LE SURFACES;

'APPLICATION FILED FEB. 21, 19H- 4 Patented May 7,1918.

A TTORNEY UNITED STATES PATENT OFFICE.

CHARLES W. SAALB'URG, 0F

RICHMOND HILL,

NEW YORK, 'ASSIGNOR TO MULTICOLOR INTAGLIO PRESS COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

PROCESS OF GUIDE-MARKING ETCHABLE SURFACES.

Patented May '7, 1918.

Application filed February 27, 1917. Serial No. 151,167.

To all whom. it may concern:

Be it known that I, CnAnLns W. SAAL- BURG, a citizen of the United States, residing at Richmond Hill, in the county of Queens and State of New York, have invented certain new and useful Improvements in Processes of Guide-Marking Etchable Surfaces, of which the following is a specification.

This invention relates to a method for use in providing etchable copper or other rolls with guide-marks which may be availed'of in subsequently applying photographic carbon-tissue prints to the rolls preparatory to etching the rolls for use in multicolor printing. The object of the invention is to form suitable guide-marks individually and successively on each of the series of rolls, but preferably on an entire cooperating series of such rolls and in such wise that the marks may be applied to a series of rolls with exactitude as regards the same relative location of the marks on all the rolls of the series. The ultimate object is to insure great eXactitudeof registration of the etchings which cooperate in printing each one color in multicolor printing.

In the accompanying drawings forming a part hereof and illustrating the principle of the invention in the best mode now known to me,

Figure 1 is a face view of any picture of any kind that it is intended to reproduce. This picture is shown with corner guidemarks drawn on its face.

Fig. 2 is a face view of a photographically-sensitized carbon-tissue print made from the subject-matter picture in a printing frame. The tissue print of Fig. 2 is shown as the same size as that of the subject-matter picture shown in Fig. 1, but may be larger or smaller as preferred.

Fig. 3 is a face view of a sheet mount on which a series of carbon-tissue prints have been laid out as required for the product to be finally printed. This view shows a carhon-tissue print like that of Fig. 2, located on the layout mount, and shows other carbon-tissue prints from other pictures. The carbon-tissue prints on the mount have their backs uniformly and continuously fixed thereon.

Fig. 4 is an elevation of an engraving machine of typical form, the table of which I provide with alining bars for the mount which is shown in place on the table.

' draw on its face suitable desired process,

indicated by 3, is shown 1n Fig. 2. The

corner marks of the subject-matter picture are shown reproduced on the carbon-tissue print or film and the reproduced corner marks or guide-marks which may be of any desired proper configuration or lines, are indicated by 4. Thus I may make a photograph of a picture in an art gallery, and in such case will usually reduce the photograph, and the sensitized carbon-tissue film print 3, when developed, will be of convenient size for mounting on a flat sheet mount 5 of suitable material. In Fig. 3 I show the carbontissue print of Fig. 2 suitably placed with its corner or guide marks a visible. The back of the picture is pasted smoothly on the mount. In Fig. 3 I show other prints assembled on the mount in a desired layout. Each of the prints on the layout mount is provided with suitable guide-marks 4.

The object of this invention is first to provide a layout mount which in a general sense may be considered as a pattern mount, and then securely to position on this mount one or more prints of the subject-matter finally to be reproduced from etchings made on etchable rolls; and the invention is further directed to copying on an etchable roll some or all of the guide-marks 1 so that correspondent guide-marks on a series of rolls will have precisely similar positions on the peripheries of each of the coiiperating series, and on which photographically-sensitized carbon-tissue prints having contained images, as indicated in Fig. 2, can be accurately positioned by disposition of the edges of such prints to the guide-marks 4 copied from the guide-marks of the prints on the layout or pattern mount. In Fig. 4 I show the mount 5 alined to guide-ribs 6 and 7 on the table 8 of an engraving machine. The rib 6 is parallel to a vertical plane passing From this subject-matter picture as through the axis of a copper roll 9. The rib 7 is at right-angles to the rib 6 and consequently a rectangular corner of the layout or pattern mount 5 1 can be precisely positioned with reference to the periphery of the copperroll 9. The transverse crossings of the corner or guide marks 4 are parallel with the top and bottom edges 10 of the mount 5 and the verticals of the corner marks 4 are parallel with the end edges vl1 of the-mount 5. The engraver now places the guide tool 12 of the engraving machine on the corner, marks 4 and reproduces on the periphery of the copper roll 9 the corner marks 4 by means of the engraving tool ,13 as will be ,readilyunderstood. The mechanical connection of the two tools ,12 :and 13 is old and well known. vAs soon as the roll 9 has its periphery properly formed with the guide-marks 4, which may be right-angular crosses as indicated, or'straightlines such as 1-1 as indicated, orof any other proper arrangement, that roll will be removed from the engraving machine and another andcooperating etcha'ble roll put in its stead, and that roll will be similarly guideunarked and -So on as to each-of the series of etchable rolls that are to be so guide-marked preparatory to transferring and homing on the rolls photographically-sensitized carbon-tissue prints corresponding in subject-matter andeither in size or notin size tothe pattern prints on the mount. What may be called the field within the reproduced guidemarks 15 on the series of rolls is left clear by the engraver for subsequent etching through the subsequently-applied sensitized carbon-tissue print films.

hat I claim is:

.l. The process of providing a series of etchable surfaces with guide-marks for use in the subsequent location on and transfer to said surfacesrof a series'of photographicallysensitized car on-tissue prints consisting in providing the-subject-matter print or prints with photographable guide-marks; in makrolls, consisting in ing a photographic print or prints from such subject-matter print or prints and thereby reproducing on the photographic prints the guide-marks on the subject-matter print or prints and thereby converting the photographic print or prints having the photographically reproduced guide-marks into a guide-marked pattern sheet for use in an engraving or other suitable reproducingmachine; and in reproducing mechanically on said surfaces the guide-marks on such guide-marked pattern sheet.

2. The method of guide-marking etchable providing the :faCe of a subject-matter picture to be reproduced by etching on the rolls, with location guidemarks; in frame printing a sheet ofph'otographically-sensitized carbon tissue from the subject-matter picture and thereby producing a photographic tissue print ofthe subjectmatter picture showing said location guidemarks; in fixedly assembling such print with a mount; and in'meehanically reproducing the location guide marks on an etchahle'roll by use of the guide-marks on the print as pattern guides.

3. The method of guide-marking et'chable rolls, consisting in providing the faces of a series of subject-matter pictures each with location guidesmarks; in making photo graphicallyesensitized carbon-tissue prints from such subj ect-matter pictures. and thereby providing each print with photographieally reproduced location guide-marks; in making a layout of the seriesof prints on a mount by fixing each print to the mount; andin mechanically reproducing the location guide-marks on the series of prints on a roll to be etched; whereby a layout of location guide-marks corresponding to the layout of guide-marks on the series of prints is made on'theperipheral surfaceof said roll.

In testimony whereof I have hereunto set my hand this 16th day of February, '1917.

CHARLES W. SAALBURG.

Gcpies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, WashingtomD. C. 

